Doubling of yarns, threads, or filaments



Allg. 13, 1935. I w PQQLl 2,010,888

DOUBLING 0F YRNS,v THREADS, OR FILAMENTS Filed Oct. 50, 1951 a7' a1 7 57 B5- s sa se Patented Aug. 11h-1935..'` l

UNITED STATES PATENT OFFICE William Pool, Spondon, near Derby, England, as-

sgnor to Celanese Corporation o! America, a corporation of Delaware Application October 30, 1931, Serial No. 571,972

In Great Britain December A24, 1930 101mm.y (ci. 11u- 23) 'Ihis invention relates to twisting and doubling age to the end where the internal thread leaves of yarns, filaments, or threads (hereinafter rethe package, the paths followed by both threads .ferred to as threads) and in particular to twistcause them to rotate about the package, and the ing and doubling by means of devices adapted to larger number of turns, is imparted. timpart more than one turn of twist for each In the first of these cases, the external thread revolution imparted to the devices. may follow the same path as the internal thread In such devices, the package from which the from one end to the other of the device, or it thread is to be wound does not partake of the may follow an independent path, the only difierrevolution of the twisting device. The thread is ence being in the actual Point at Which doubling .dfawn ofi the package and made to form aloop of the threads commences. vIn the second case, which is carried round the package itself by it is essential that the path of the external the rotation applied to the device. Assuming the thread be independent of the internal thread in package to be stationary, two turns of twist are its first run as a loop, while in its second run as imparted for each revolution of the loop about a loop it may follow the same path as the internal f the package. Rotation of the package itself in a thread or an independent one. 15

l5 direction opposite to that of the loop enables a. 'I'he doubled threads may be collected by simple higher rate of twisting to be obtained for the winding, or may be further twisted, or doubled same rate oi revolution applied to the device. with similarly doubled or twisted or other threads The thread loop may be so guided that it reby means of a suitable twisting device such as a volves in the open air about the package, followring spindle. The degree of doubling twist ap- 20' ing a path varying from practically a straight plied by the device depends, of cour ,on the rate line to an outwardly bulging curve, depending on of take-up of the doubled thread and the rate of the tension'to which it is subjected, or it may be twisting.

constrained to a deiinite predetermined path by As. mentioned above, more than one external the use of a ilyer or the like. thread may be doubled with the internal thread,

According to the vpresent invention a device oi the external threads not, of course, being twisted 25 the above character is employed to double toy in the operation. More than one internal thread gether the thread to which the extra twist has may also be used, two or more packages, or two been imparted with thread to which no twist is or more parallel en on a package supplying given in the doubling4 operation. In carrying out these threads, which are twisted together as well the invention, a package of thread to receive asdoubled with the external thread or threads. 30

the extra twist is mounted in the device, and the By suitable adiustment of the tensions of the thread is led through the device to form a loop threads to be doubled, the structure of the douwhich is caused to revolve about the package. bled thread can be caused to vary from a cover- Another thread (or threads, though for simplicity ing of one thread by the other to a spiral or looped it will be assumed hereafter that there is only arrangement oi one on the other or a close in- 35 a single thread) is led to the axis of the device termingling of the ternal and external threads. at the end remote from that at which the firsty In this way, and by the use oi threads o! diierent thread leaves the device, and is caused to follow materials or characteristics, e. g. threads of cellua loop-like path so as to revolve about the packlose acetate with threads of wool, silk, cotton. or o age in the device. The two threads are drawn' cellulosic articial silk, a large variety of doubled together from the device, then being doubled tothreads may be produced. Further. the rate 0I gether, the one thread (the "external thread) take-up may be adjusted relatively to the rate not however being twisted. f of twisting that the thread may have a degree of The external thread may be doubled to the doubling varying from low to high or very'hish. 4,

iii-st with a number of turns equal to the twisting A variable rate of take-up enables threads of inturns applied to the device or alternatively equal termittently varying doubling -twist to be proto the twisting turns imparted to the thread on i duced. l

the package (the internal thread). For ex- Any suitable form of twisting device may be ampie, if the external thread simply runs from used provided it has means for the introduction 50 end to end oi the device as a :loop which reofthe external thread as well as means for leadvolves about the package, the lesser number of ing the doubled internal and external threads turns is imparted. It, however, it runs from one away.- Conveniently the twisting device has two end of the device to the other as a loop, and or more 'symmetrically arranged tubular iiyers thenv returns without revolving round the packthrough which the threads are led. When the 56.

the external thread first passes independently through one flyer, and after passing through the axis of the package, is led through another flyer,-

which may be the same as that through'which the internal thread passes.

In order to lead the threads into and away from the twisting device, the device has a hollow spindle at each end, the yers being connected to these spindles in such a manner. that the thread can be drawn through the spindles and flyers without excessive tension.

Each spindle may be mounted in ball or other bearings, or the flyers may be made sufficiently strong' to carry one spindle without the provision of a bearing for that spindle. The'device is driven by means such as belt or other gearing or an electric motor coupled to the spindle. The internal package or packages may be held stationary, or substantially so, by friction wheels carried bodily round by the driven spindle and engaging respectively a race on the package support and a fixed race independent of the package, as described in U. S. Patent No. 1,949,621.

Alternatively, gears may be used in place of the friction wheels and races described above, and again, such gears or friction devices may be used to rotate the internal package or packages, preferably in such a direction as will increase the rate of doubling. Such devices may be arranged with vertical, inclined, or horizontal axes. 'I'he device may however be arranged with a horizontal or inclined axis and the internal package kept stationary by gravity by having its centre of gravity below the axis of rotation of the device.

The invention will now be described with reference to the accompanying drawing, but it is to be understood that this description is given by way of exampleonly, and is in no way limitative. Fig. 1 shows one form of driving arrangement for the twisting device used for the purpose of the invention;

Fig. 2 shows an alternative form of driving device;

Fig. 3 shows the lay-out of a twisting device used for doubling the threads to a low degree' of doubling twist;

Fig. 4 shows an arrangement for doubling the threads to a high degree of doubling twist; and

Fig. 5 shows another arrangement for doubling the threads to a low degree, one of the threads being taken from outside the twisting device.

Referring to Fig. 1, one or more bobbins 8 are mounted on brackets 9 carried upon a platform I0. The platform I0 is fixed to a hollow spindle II, carried by means of ball bearings I2 in an enlarged portion I3 of a further hollow spindle I4. The spindle I4 is mounted in ball bearings I 5 and is driven by means of a whorl I6. A 'short spindle I8 is supported by ball bearings I1 in the enlarged portion I3 of the spindle I4, the spindle I 8 being parallel to the axis of the spindle I4. and having gears I9, 20 flxed to its upper and lower ends respectively. 'I'he gear I9 meshes with a further gear 2| attached to the spindle II carrying the platform I0, while the gear 20 at the lower end of the spindle I 8 meshes with a gear 22, rigidly xed to the frame of the device. The gears I9 and 20 being of the same size. and the gears 2| and 22 being also of the same size, the 'rotation of the spindle I1 about the axis of the spindle I4 causes the gear 2| to remain stal tionary like the gear 22, with the result that the platform I0 and the package 8 are held sta-l tionary, and are not permitted to rotate with the spindle I4. The frame of the device to which the gear 22 is xed rises in a flange 25 to enclose the gears 20, 22 and in a similar manner the enlarged portion I3 of the spindle I4 rises in a flange 26 to enclose the gears I 9 and 2 I.

The enlarged portion I3 of the spindle I4 also carries two flyer tubes 21, 21' communicating with the hollow interior of vthe enlarged portion I3, the iiyers passing out of the portion I3 from points lying at right angles to the points at which the spindles I1 are carried. For this reason the yer 21 on the left of Fig. 1 is shown in dotted lines, since the section on which this figure is taken is on two lines meeting at right angles at the centre of the spindle, so that the flyer 21 does not actually lie in the section shown.

An alternative form of driving device producing the same eifect-is shown in Fig. 2. In this case the platform I0 is mounted on ball bearings I2 surrounding a spindle 43 which has an enlarged portion 44 and is driven by means 'of a whorl 45. The enlarged portion 44 of thel spindle l43 contains horizontal passages 46 leading to the flyers 21, 2.1 which are mounted on an annular ring 41 forming part of the enlarged portion 44. Disposed at points at right angles to the passages 46 are short spindles 48 carrying rollers 49 contained in recesses 50 in the enlarged portion 43. lThe rollers 49 are loosely mounted on the spindles 48, so that as the spindle 43 rotates the rollers ily outwards. Each roller 49 carries two flanges 5I, 52 at the top and bottom respectively. The flange 5I engages with an annular depending race 53 rigidly flxed to the platform I0. The lower iiange 52 engages with a similar annular race 55 carried by the frame 56 of the machine. Since the flanges 5I, 52 are of the same size, the races 53, 55 are frictionally geared together, so that the upper race 53 is caused to remain stationary. As a result, the platform I0 of the bobbin 8 which is carried thereon, is caused to be held stationary while the Y Referring to Fig. 3 a method of doubling together a highly twisted thread with a thread to.

which no twist is imparted is shown. As generally indicated at 26, a driving device such as is illustrated in Fig. 1 or v2 is provided by means of which the flyers 21, 21' may be caused to rotate at high speed, while the platform I0 which carries bobbins of thread on brackets 9 is caused to remain stationary. In the arrangement shown, the untwisted thread comes from bin 58 mountedon the same platform IIJ as the bobbin 59 from which the thread to be highly twisted is drawn. The thread 60 coming from the bobbin 59 passes through a guide 6i down the flyer 21' to the hollow interior of the driving spindle I4, and thereby receives number oi' turns of twist equal to twice the revolutions of the driving spindle. Inside the hollow spindle I4, the thread 60 meets the thread @i2 which passes directly through the platform IG and through the hollow spindle on which be piatform IU is carried, and is doubled with t tlm-od 60 with-a number of turns equal to t of revolutions of the device to f thread 63. It will be seen that the t.; passes directly from a stationary bobbin out of the device, and that doubling a bobby wrapping the loop of the thread l0 about the thread 6I.

Referring to Fig. 4, the thread 65 receiving no twist is taken from an external package 66,

while the thread 61 to be twisted to a high degree is taken from a package 68 mounted in the twisting device. The thread 65 passes into the hollow connecting piece 51 to which the flyers 21, 21.' are attached, and then passes round the package 6l through the flyer 21 to the hollow interior of the spindle I4. The thread then passes through the axis of the package 68 back to the connecting piece 51. At this point the threads 65 and i1 meet. and pass together down the flyer 21' back to the interior of the hollow spindle Il and thence out at the bottom of the spindle. Since the loop of the thread 85 contained in the yer 21 rotates about the package 68, the thread 65 is wrapped round the thread 61 with a number of turns equal to the revolutions of the spindle. At the same time a twist is put into both the threads 65 and 61 equal also to the revolutions of the spindle. As the two threads 61 and 65 pass down the flyer 21, and are rotated togetherv in a loop about the package 68, they are doubled together with an additional number of turns, also equal to the revolutions of the driving spindle, this further doubling having the efvi feet of removing the twist already imparted to the thread 65, and further twisting the thread $1. Thus the final doubled thread 69 passing out ot the bottom of the hollow spindle I4, con- 'sists of an untwisted thread 65 and of a thread 61 twisted to twice the revolutions of the twisting device, the two threads being doubled together with a number of twists equal to twice the revolutions of the twisting device. r

In Fig. 5 an arrangement is shown for producing the same eii'ect as that produced in the arrangement of Fig. 3, with the difference in method that the thread 62 which is not to be twisted is taken from the package 66 outside the device, and is led from the connecting piece 51 down the flyer 21 to the hollow interior of the spindle Il, where it meets the thread 60 which has passed down the flyer 21. As in Fig. 3 the rotation of the loop of the thread 60 contained in the flyer 21` about the package 59 causes the thread 60 to be twisted to a number of turns equal to twice the revolution of the twisting device. The thread 62 passing down the flyer 21 does not receive any degree of twist, but is doubled together with the thread 60 to a number of doubling turns equal to the revolutions of the spindle.

What I claim and desire to secure Patent is:- l

Method of doubling threads comprising drawing a thread through a looped path from a packf` age in a twisting device, rotating the loop of thread so formed completely about the package so as to twist the thread during drawing, drawing a further thread from a supply outside the twisting device, passing such further thread around a looped path which rotates completely about the package within the twisting device, passing such further thread through the axis of said package, associating the further thread with the thread drawn from the package, and carrying the further thread'along the looped path followed by the thread drawn from the package whereby the further thread, while-not receiving any twist during the operation, is doubled with the thread drawn from the package to a degree equal to the degree of twist imparted to the thread drawn from the package.

by Lettersl WILLIAM POOL. 

